37 lines
681 B
Python
37 lines
681 B
Python
import sys
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from collections import defaultdict as DD
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D = DD(set)
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S = set()
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for i in sys.stdin.read().strip().split('\n'):
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a, b = i.split("-")
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D[a].add(b)
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D[b].add(a)
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S.add(a)
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S.add(b)
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G = set()
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m = 0
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def grow(group:set[str], l:int):
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global m
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key = ','.join(sorted(group))
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if key in G:
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return
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G.add(key)
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if l>m:
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print(l, key)
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m = l
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rest = S - group
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for r in rest:
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if len(group & D[r]) == l:
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ng = group.copy()
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ng.add(r)
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yield (l+1, ng)
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yield from grow(ng, l+1)
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for a, B in D.items():
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for b in B:
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for i,s in grow({a,b},2):
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pass
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